| Autor: |
Brian J. Miller, Bronis R. de Supinski, Michael Welcome, Andrew W. Cook, Robert K. Yates, William H. Cabot, Peter Williams |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
SC |
| DOI: |
10.1109/sc.2005.70 |
| Popis: |
We describe Miranda, a massively parallel spectral/compact solver for variabledensity incompressible flow, including viscosity and species diffusivity effects. Miranda utilizes FFTs and band-diagonal matrix solvers to compute spatial derivatives to at least 10th-order accuracy. We have successfully ported this communicationintensive application to BlueGene/L and have explored both direct block parallel and transpose-based parallelization strategies for its implicit solvers. We have discovered a mapping strategy which results in virtually perfect scaling of the transpose method up to 65,536 processors of the BlueGene/L machine. Sustained global communication rates in Miranda typically run at 85% of the theoretical peak speed of the BlueGene/L torus network, while sustained communication plus computation speeds reach 2.76 TeraFLOPS. This effort represents the first time that a high-order variable-density incompressible flow solver with species diffusion has demonstrated sustained performance in the TeraFLOPS range. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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